USED RADIOS 28-69-06A Bird Txrx Vari Notch Cavity Duplexer 4-INCH 470-512

( Brand: Used Radios ), ( Manufacturer Part Number: 28-69-06A ), ( Color: Gold ), ( Type: Infrastructure )

Review USED RADIOS Bird Txrx Vari notch 4-inch Cavity Duplexer Mhz

The **Radios 28-69-06A Bird TXRX Vari-Notch 4-Inch Cavity Duplexer (470-512 MHz)** is a high-performance, precision-engineered duplexer designed to excel in demanding RF applications where signal integrity and isolation are paramount. Built upon Bird s legacy of reliability and innovation, this duplexer operates within the critical 470 512 MHz frequency range, making it an ideal solution for satellite communications, military radar systems, test and measurement equipment, and other high-frequency applications requiring robust duplexing capabilities. Its **4-inch cavity design** ensures exceptional isolation between transmit and receive paths, minimizing interference and maximizing signal clarity critical for applications where even the slightest cross-talk could compromise performance. The **Vari-Notch feature** allows for dynamic tuning of the duplexer s response, enabling operators to adjust the notch frequency to accommodate specific signal requirements, whether for filtering out unwanted harmonics, suppressing interference, or optimizing bandwidth efficiency. Constructed from high-grade materials, including precision-machined aluminum cavities and durable RF connectors, this duplexer is built to withstand harsh environments while maintaining consistent performance under varying thermal and mechanical stresses. Its compact yet robust form factor makes it suitable for integration into both laboratory setups and field-deployed systems, where space and reliability are equally important. Whether used in satellite uplink/downlink systems, radar signal processing, or advanced test equipment, the **28-69-06A** delivers unparalleled isolation (typically exceeding 60 dB) and low insertion loss, ensuring that transmitted and received signals remain clean, distinct, and free from degradation. With its combination of adaptability, durability, and high-frequency precision, this duplexer stands as a cornerstone for professionals demanding the highest standards in RF signal management.

### **Pros and Cons of buying a Yaesu FT-28RU (FT-28-69-06A) with Vari-NOTCH and 4-Inch Cavity Duplexer (470-512 MHz)**

#### **Pros**

1. **Versatile Frequency Range (470 512 MHz)**

- The unit covers the 70 cm band, which is useful for local repeaters, emergency communications, and general amateur radio use. This range is popular in many regions for VHF/UHF operations.

2. **Built-in Vari-NOTCH Functionality**

- The Vari-NOTCH feature allows for dynamic interference suppression, helping to filter out strong signals (such as those from digital TV, Wi-Fi, or other transmitters) that could otherwise cause splatter or desensitization. This is particularly useful in urban areas with heavy RF noise.

3. **4-Inch Cavity Duplexer (470-512 MHz)**

- A duplexer allows simultaneous transmission and reception on the same antenna, which is essential for repeaters or when operating on shared frequencies. The 4-inch cavity design provides better isolation and efficiency compared to smaller duplexers, reducing interference and improving signal clarity.

4. **Compact and Portable Design**

- The FT-28RU is a handheld transceiver, making it highly portable for field operations, emergency use, or mobile setups in vehicles. Its size and weight make it easier to carry than larger base station radios.

5. **Good Audio Quality and Clarity**

- Yaesu radios are known for their audio performance, with clear voice transmission and reception. The built-in speaker and headphone jack provide decent audio output for handheld use.

6. **Durable Construction**

- Yaesu radios are generally well-built, with rugged casings that can withstand occasional drops or rough handling. The FT-28RU is no exception, making it suitable for outdoor or mobile use.

7. **Compatibility with Accessories**

- The radio supports a wide range of accessories, including external speakers, microphones, and power supplies. The presence of a 2.4 GHz Bluetooth interface (in some models) also allows for hands-free operation via a smartphone.

8. **User-Friendly Interface**

- The FT-28RU features a straightforward control layout with intuitive buttons and a clear display. Programming via CHIRP or other software makes it easy to customize memory channels and settings.

9. **Long-Term Availability and Support**

- Yaesu is a well-established brand with a strong aftermarket support system. Parts and service for this radio are likely to remain available for years, reducing long-term maintenance concerns.

10. **Cost-Effective for the Features Offered**

- Compared to some newer or more advanced radios, the FT-28RU with the duplexer and Vari-NOTCH provides excellent value for its price, especially for those who need reliable 70 cm operation without the complexity of a full base station setup.

---

#### **Cons**

1. **Limited Frequency Range**

- The radio is restricted to the 470 512 MHz band, which may not be sufficient if you plan to operate on other VHF/UHF bands (e.g., 2 meters, 1.25 meters, or higher frequencies). If you need multi-band capability, you would require a separate radio.

2. **No Built-in DMR or Digital Modes**

- The FT-28RU does not support digital modes like DMR, D-STAR, or FM Digital Voice (FMDV). If you re interested in digital repeaters or modern digital communication, you would need a separate radio or adapter.

3. **Weaker Power Output (5 Watts Max)**

- The maximum power output is 5 watts, which may be insufficient for long-distance communication or weak-signal operations, especially in areas with poor propagation. Base station radios often offer higher power (e.g., 25 50 watts).

4. **No Built-in GPS or APRS**

- Unlike some modern handhelds, the FT-28RU lacks GPS or Automatic Packet Reporting System (APRS) functionality, which can be useful for tracking location or digital messaging in emergency scenarios.

5. **Dependence on External Power for Extended Use**

- While the radio has a built-in rechargeable battery, prolonged use may drain it quickly. For extended operations, an external power supply (e.g., 12V adapter) is recommended, adding to the setup cost.

6. **Potential for RF Interference in Noisy Environments**

- While the Vari-NOTCH helps, strong interference from nearby transmitters (e.g., Wi-Fi, cordless phones, or digital TV signals) can still degrade performance. Urban areas with dense RF activity may require additional filtering or a different antenna.

7. **No Built-in Noise Blanker**

- The Vari-NOTCH is a step up from a basic noise blanker, but it may not be as effective as dedicated noise reduction features found in some higher-end radios. Manual tuning may still be required for optimal performance.

8. **Limited Memory Channels**

- The FT-28RU has a moderate number of memory channels (typically around 100 200, depending on the model), which may be insufficient for users with many repeaters or frequency lists. However, this can be mitigated by using external programming software.

9. **No Built-in Band-Scan Function**

- Unlike some radios, the FT-28RU does not have a built-in band-scan feature, which can be useful for quickly locating active repeaters or signals. This requires manual tuning.

10. **Potential for Obsolescence**

- While Yaesu radios are durable, newer models may introduce features (e.g., digital modes, touchscreens, or improved duplexers) that could make this radio feel outdated over time. However, its simplicity and reliability make it a solid choice for basic use.

---

### **Conclusion**

The **Yaesu FT-28RU (FT-28-69-06A) with Vari-NOTCH and 4-inch cavity duplexer (470-512 MHz)** is an excellent choice for amateur radio operators who prioritize **reliable 70 cm operation, interference suppression, and portability**. Its compact size, good audio quality, and robust construction make it ideal for handheld use, emergency communications, or mobile setups where space is limited. The Vari-NOTCH and duplexer are particularly valuable features for users in noisy environments or those operating on repeaters.

However, if you require **multi-band capability, digital modes (DMR/D-STAR), higher power output, or advanced features like GPS/APRS**, this radio may not fully meet your needs. In such cases, you might consider a more advanced handheld (e.g., Yaesu FT-65R, Icom IC-V80) or a base station radio.

For **budget-conscious operators who need a dependable 70 cm radio with interference suppression and duplexer functionality**, the FT-28RU is a **strong recommendation**. Its balance of performance, durability, and affordability makes it a practical tool for both casual and serious hobbyists.

---

### **Final Recommendation**

- You primarily operate on the 70 cm band (470 512 MHz).

- You need a portable, handheld radio for field use or emergency communications.

- Interference suppression is a concern in your operating area.

- You want a reliable, well-built radio without unnecessary complexity.

- You re on a budget but still want professional-grade features.

- You need multi-band or higher-frequency coverage.

- Digital modes (DMR, D-STAR) are a priority.

- You require higher power output for long-distance communication.

- You want advanced features like GPS, APRS, or touchscreen controls.

Overall, this radio is a **solid investment for 70 cm enthusiasts** who value simplicity, performance, and durability.

Details:

FREE Shipping. Used Radios-live. Money Back Or Replacement. Tuning to frequency available.

Model Number: 28-69-06A Frequency Range: 470-512 MHz SEPARATION: 3.0 Insertion Loss: 1.25 dB Isolation: 86 Dimensions: 5.25 x 19 3/-9 Bird TXRX VARI-NOTCH 4-INCH CAVITY DUPLEXER 28-69-06A: Unit is in good condition, has normal cosmetic wear and been pulled from a working system.

part #: 286906a prices

• $5.90-$7.90

specifications twowayradiobob:

• brand: Used Radios
• mpn: 28-69-06a
• color: Gold
• type: Infrastructure

offer twowayradiobob:

• availability: In Stock
• started: June 3, 2026
• quantity: 2
• options: Ship-to-home
• sold: 0

shipping twowayradiobob:

• transit: 9-15 Days
• cost: $0.00
• class: Standard
• service: Standard
• type: Fixed

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• rating: 99.8%
• city: Denver, Colorado
• # reviews: 21946

returns twowayradiobob:

• method: Money back
• policy: Returns Accepted
• paid by: Buyer
• time: 30 Days

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general twowayradiobob:

• Consumer Electronics > Radio Communication > Walkie Talkies, Two-Way Radios
• condition: Used

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